/
common_sync.go
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/
common_sync.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package shootstate
import (
"context"
"fmt"
apiextensions "github.com/gardener/gardener/pkg/api/extensions"
gardencorev1alpha1 "github.com/gardener/gardener/pkg/apis/core/v1alpha1"
gardencorev1alpha1helper "github.com/gardener/gardener/pkg/apis/core/v1alpha1/helper"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/operation/common"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
corev1 "k8s.io/api/core/v1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
func createEnqueueOnAddFunc(queue workqueue.RateLimitingInterface) func(extensionObject interface{}) {
return func(newObj interface{}) {
enqueue(queue, newObj)
}
}
func createEnqueueOnUpdateFunc(queue workqueue.RateLimitingInterface) func(newExtensionObject, oldExtensionObject interface{}) {
return func(newObj, oldObj interface{}) {
var (
newExtensionObj = newObj.(extensionsv1alpha1.Object)
oldExtensionObj = oldObj.(extensionsv1alpha1.Object)
)
if apiequality.Semantic.DeepEqual(newExtensionObj.GetExtensionStatus().GetState(), oldExtensionObj.GetExtensionStatus().GetState()) {
return
}
enqueue(queue, newObj)
}
}
func enqueue(queue workqueue.RateLimitingInterface, obj interface{}) {
key, err := cache.MetaNamespaceKeyFunc(obj)
if err != nil {
return
}
queue.Add(key)
}
func (s *SyncController) createShootStateSyncReconcileFunc(ctx context.Context, kind string, objectCreator func() runtime.Object) reconcile.Func {
return func(req reconcile.Request) (reconcile.Result, error) {
obj := objectCreator()
err := s.seedClient.Client().Get(ctx, req.NamespacedName, obj)
if apierrors.IsNotFound(err) {
s.log.Debugf("Skipping ShootState sync because resoruce with kind %s is missing in namespace %s", kind, req.NamespacedName)
return reconcile.Result{}, nil
}
if err != nil {
return reconcile.Result{}, err
}
extensionObject, err := apiextensions.Accessor(obj)
if err != nil {
return reconcile.Result{}, err
}
if extensionObject.GetDeletionTimestamp() != nil {
return reconcile.Result{}, nil
}
clusterName := fromRequest(req)
cluster := &extensionsv1alpha1.Cluster{}
if err := s.seedClient.Client().Get(ctx, kutil.Key(clusterName), cluster); err != nil {
if apierrors.IsNotFound(err) {
return reconcile.Result{}, nil
}
return reconcile.Result{}, fmt.Errorf("could not get cluster with name %s : %v", clusterName, err)
}
shoot, err := s.shootRetriever.FromCluster(cluster)
if err != nil {
return reconcile.Result{}, err
}
name := extensionObject.GetName()
purpose := extensionObject.GetExtensionSpec().GetExtensionPurpose()
state := extensionObject.GetExtensionStatus().GetState()
shootState := &gardencorev1alpha1.ShootState{ObjectMeta: metav1.ObjectMeta{Name: shoot.Name, Namespace: shoot.Namespace}}
if _, err := controllerutil.CreateOrUpdate(ctx, s.k8sGardenClient.Client(), shootState, func() error {
return updateShootStateExtensionState(state, shootState, kind, name, purpose)
}); err != nil {
message := fmt.Sprintf("Shoot's %s %s extension state with name %s and purpose %s was NOT successfully synced: %v", shoot.Name, kind, name, purposeToString(purpose), err)
s.log.Error(message)
s.recorder.Event(shootState, corev1.EventTypeNormal, "ScheduledNextSync", message)
return reconcile.Result{}, err
}
message := fmt.Sprintf("Shoot's %s %s extension state with name %s and purpose %s was successfully synced", shoot.Name, kind, name, purposeToString(purpose))
s.log.Info(message)
s.recorder.Event(shootState, corev1.EventTypeNormal, "ScheduledNextSync", message)
return reconcile.Result{}, nil
}
}
func updateShootStateExtensionState(extensionState *runtime.RawExtension, shootState *gardencorev1alpha1.ShootState, kind string, name string, purpose *string) error {
list := gardencorev1alpha1helper.ExtensionResourceStateList(shootState.Spec.Extensions)
if extensionState == nil {
list.Delete(kind, &name, purpose)
shootState.Spec.Extensions = list
return nil
}
list.Upsert(&gardencorev1alpha1.ExtensionResourceState{
Kind: kind,
Name: &name,
Purpose: purpose,
State: *extensionState,
})
shootState.Spec.Extensions = list
return nil
}
func purposeToString(purpose *string) string {
if purpose == nil {
return "<nil>"
}
return *purpose
}
func fromRequest(req reconcile.Request) (clusterName string) {
if req.Namespace == "" {
// Handling for cluster-scoped backupentry extension resources.
clusterName, _ = common.ExtractShootDetailsFromBackupEntryName(req.Name)
} else {
clusterName = req.Namespace
}
return
}